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ISL6235

Intersil Corporation
Part Number ISL6235
Manufacturer Intersil Corporation
Description Advanced Triple PWM Only Mode and Dual Linear Power Controller
Published Apr 7, 2005
Detailed Description NS ES I G D W NT R NE D F O LA C EM E E D MEN ED REP b. 2004) COM D E R Data Sheet EN le Fe NOT ECOMM (Availab R 232 I S...
Datasheet PDF File ISL6235 PDF File

ISL6235
ISL6235

Overview
NS ES I G D W NT R NE D F O LA C EM E E D MEN ED REP b.
2004) COM D E R Data Sheet EN le Fe NOT ECOMM (Availab R 232 I S L6 TM ISL6235 June 2001 FN9029 Advanced Triple PWM Only Mode and Dual Linear Power Controller for Portable Applications The ISL6235 provides a highly integrated power control and protection solution for five output voltages required in highperformance notebook PC applications.
The IC integrates three fixed frequency pulse-width-modulation (PWM) controllers and two linear regulators along with monitoring and protection circuitry into a single 24 lead SSOP package.
The two PWM controllers that regulate the system main 5V and 3.
3V voltages are implemented with synchronousrectified buck converters.
Synchronous rectification insures high efficiency over a wide range of input voltage and load variation.
Efficiency is further enhanced by using the lower MOSFET’s rDS(ON) as the current sense element.
Input voltage feed-forward ramp modulation, current-mode control, and internal feed-back compensation provide fast and stable handling of input voltage load transients encountered in advanced portable computer chip sets.
The third PWM controller is a boost converter that regulates a resistor selectable output voltage of nominally 12V.
Two internal linear regulators provide +5V ALWAYS and +3.
3V ALWAYS low current outputs required by the notebook system controller.
Features • PWM Only Mode for Reduced Noise at Light Loads • Provides Five Regulated Voltages - +5V ALWAYS - +3.
3V ALWAYS - +5V Main - +3.
3V Main - +12V • High Efficiency Over Wide Line and Load Range - Synchronous Buck Converters on Main Outputs • No Current-Sense Resistor Required - Uses MOSFET’s rDS(ON) - Optional Current-Sense Resistor for More Precision • Operates Directly From Battery 5.
6 to 24V Input • Input Undervoltage Lock-Out (UVLO) • Excellent Dynamic Response - Voltage Feed-Forward and Current-Mode Control • Monitors Output Voltages • Synchronous Converters Operate Out of Phase • Separ...


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